Cargo box door safety chain



FIG. 1 is a side elevational view of a cargo box door safety chainshowing our new design, the opposite side being a mirror image thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left end elevational view thereof;

FIG. 4 is a right end elevational view thereof; and

FIG. 5 is a vertical cross-sectional view thereof, taken along line 5--5of FIG. 1.

The ornamental design for a cargo box door safety chain, as shown anddescribed.